the Lives of Dax is basically a Doctor Who anthology, which each Dax's story corresponding to the equivalent Doctor. The second Dax story is Troughton-esque, the fourth Dax story is like the Hinchliffe/Holmes era, the sixth Dax story is obviously about a mentally unstable, homicidal Dax. And there's a regeneration story, too.
And the third is Earthbound. Though that seems like cherrypicking to fit a desired pattern rather than a built-in feature.
I know that Marco has said it wasn't intentional, but the way the stories break down...
First Dax (Lela) -- Rebels and leaves homeworld
Second Dax (Tobin) -- Acts like a jokester
Third Dax (Emony) -- Earthbound and a woman of action
Fourth Dax (Audrid) -- Gothic horror
Fifth Dax (Torias) -- Self-sacrificing
Sixth Dax (Joran Belar) -- Passionate and homicidal
Seventh Dax (Curzon) -- A manipulative bastard
I've blanked on the eighth Dax (Jadzia) story in the book, and the ninth Dax story (Ezri) is a regeneration story.